This is a normal phenomenon and it does not compromise the quality of serum in any way.

Larger mammals are often preferred as the amount of serum that can be collected is greater.

The effects of higher serum plant sterol levels are so far not completely understood.

If my theory is correct, we'll need rather a lot of serum.

More units of serum were discovered around Juneau the same day.

During the night," he said, "I got another lot of serum ready.

They're not here to provide any sort of blood by-product or serum.

Its consistency resembles that of serum, and can usually be seen in certain disease states like tuberculosis.

There's not a drop of serum in the town-for anyone.

At no time was the volume of serum available sufficient.